First of all, I want to clarify that I am very bad at puzzles, so keep that in mind when reading this.
The puzzles are simple, but I often felt like I couldn't move forward because I couldn't see many available combos (I'm not sure if it was because I had trouble distinguishing them visually or because I'm very dumb). I also wasn't very interested in continuing to play because I think part of the fun of this game is watching the animations. However, I can't pay attention to them because I'm focused on the game. I understand why the animations progress alongside my score, but when I go slowly or score few points, the animations stop. This makes me feel pressured and I end up not enjoying either the animation or the game.
Other than that, I'd like to see the whole thing, because even though it might not be for me, I can see that it's a good project.
Anything that makes you add more animations should be a yes. But I'm only saying that because I love your art!
By the way, I love Monster Mind.